References
Verity stands on a large body of public, peer-reviewed forensic-statistics work. These are the methods it builds on, the field reviews that motivated it, the open datasets and tooling it is validated against, and the statistics it borrows. Every claim on this site traces back to one of these.
Foundational method
The automatic-matching and congruent-cell methods Verity generalizes into one calibrated pipeline.
Hare, E., Hofmann, H. & Carriquiry, A. (2017). Automatic matching of bullet land impressions. Annals of Applied Statistics 11(4), 2332–2356.
The CSAFE/Iowa State automatic bullet-matching method Verity generalizes and deploys.
Song, J. (2013). Proposed congruent matching cells (CMC) method for ballistic identification and error rate estimation. AFTE Journal 45(2), 184–194 · NIST.
Congruent Matching Cells — the cell-counting idea Verity extends to Congruent Matching Regions for any mark.
Song, J., Vorburger, T. V., Chu, W., Yen, J., Soons, J. A., Ott, D. B. & Zhang, N. F. (2018). Estimating error rates for firearm evidence identifications in forensic science. Forensic Science International 284, 15–32.
The NIST CMC line on error-rate estimation that Verity reframes as a calibrated, bounded likelihood ratio.
Chumbley, L. S., Morris, M. D., Kreiser, M. J., Fisher, C., Craft, J., Genalo, L. J., Davis, S., Faden, D. & Kidd, J. (2010). Validation of tool mark comparisons obtained using a quantitative, comparative, statistical algorithm. Journal of Forensic Sciences 55(4), 953–961.
The objective screwdriver-toolmark comparison (the Chumbley U-statistic) Verity benchmarks against on striated toolmarks.
Standards & critiques
Two decades of community review that named the gaps Verity sets out to close.
National Research Council (2009). Strengthening Forensic Science in the United States: A Path Forward. The National Academies Press.
The landmark report calling for measurable, validated foundations in forensic comparison.
President's Council of Advisors on Science and Technology (PCAST) (2016). Forensic Science in Criminal Courts: Ensuring Scientific Validity of Feature-Comparison Methods. Executive Office of the President.
Set the bar for empirical validity and characterized error rates in feature-comparison disciplines.
Cuellar, M., Vanderplas, S., Luby, A. & Rosenblum, M. (2024). Methodological problems in every black-box study of forensic firearm comparisons. Law, Probability and Risk 23(1), mgae015.
Found that no firearms discipline has a characterized error rate — the gap Verity answers with a named, bounded Cllr.
Hamby, J. E., Brundage, D. J. & Thorpe, J. W. (2009). The identification of bullets fired from 10 consecutively rifled 9 mm Ruger pistol barrels: a research project involving 507 participants from 20 countries. AFTE Journal 41(2), 99–110.
The Hamby 10-barrel test sets (e.g. 252, 173) — the canonical bullet benchmark Verity is validated on.
Fadul, T. G., Hernandez, G. A., Stoiloff, S. & Gulati, S. (2011). An empirical study to improve the scientific foundation of forensic firearm and tool mark identification utilizing 10 consecutively manufactured slides. AFTE Journal 43(3) · NIJ Award 2009-DN-BX-K230.
The Fadul consecutively-manufactured cartridge-case study — the impressed-mark benchmark Verity reports on.
Datasets & tooling
The public benchmark data and open-source tooling Verity is validated against and interoperates with.
Zheng, X., Soons, J., Vorburger, T. V. et al. (NIST) (2020). NIST Ballistics Toolmark Research Database. Journal of Research of NIST 125, 125004 · tsapps.nist.gov/NRBTD.
The open NBTRD repository of 3-D bullet/cartridge/toolmark scans Verity's data catalog harvests and labels.
Hofmann, H., Vanderplas, S., Krishnan, G. & Hare, E. (2024). x3ptools: Tools for Working with 3D Surface Measurements. R package (CRAN), v0.0.4.
The reference R reader/writer for the X3P (ISO 25178-72) format Verity's native Rust codec is interoperable with.
Vanderplas, S., Nally, M., Klep, T., Cadevall, C. & Hofmann, H. (2020). Comparison of three similarity scores for bullet LEA matching. Forensic Science International 308, 110167.
The automatic bullet-analysis pipeline (bulletxtrctr) Verity benchmarks its bullet-land scores against.
Statistics
The calibration and weight-of-evidence machinery Verity borrows from forensic speaker comparison.
Brümmer, N. & du Preez, J. (2006). Application-independent evaluation of speaker detection. Computer Speech & Language 20(2–3), 230–275.
The origin of the Cllr cost — Verity's calibration metric for the weight of evidence.
13 references. Verity is an independent project; citation here indicates scientific lineage and validation targets, not endorsement or affiliation by the cited authors or their institutions.